Adding watermark bitmap over video in android: 4.3’s MediaMuxer or ffmpeg

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I don’t know much about the MediaMuxer but ffmpeg does support overlaying functionality. FFMPEG has various filters one of them is overlay filter. What I understand is you want to overlay an image (i.e. png) on the video, ffmpeg surely is a useful framework to do this job. You can set the output format you can set the co-ordinates of the image which is to be overplayed.

E.g.

ffmpeg -i input.avi -i logo.png -filter_complex 'overlay=10:main_h-overlay_h-10' output.avi

Above command adds overlays logo.png on the input.avi video file in bottom left corner.

More information about the filters is available at following website,

https://www.ffmpeg.org/ffmpeg-filters.html#overlay-1

If this is a solution to your problem you need the C code equivalent to the above command. You also need to see the performance of the ffmpeg because it a pure software framework.

Hope I have understood your question correctly and this helps.

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